Veneer clipping machine



Oct. 25, 1932. R. w, STANLEY VENER CLIPPING- MACHINE 2 Sheets-SheetFiled Jan. l1. 1930 Oct. 25, 1932. R W STANLEY 1,884,336

VENEER CLIPPING MACHINE Filed Jan. 11, 1930 2 Sheets-Sheet 2 g m: :a

INVENTOR. M

72 v ATTORNEYS.

' veneer clipping machines.v

Patented Oct. 25, 1932 g i UNITED STATES;

wvl*ENTy OFFICE RICHARD W. STANLEY, OE LOoxrO-RT, NEW YORK,-AssIGNOR 'roMEEEITT ENGINEERING a SALES OOMEANY, ING.; or Locxroa'r, NEW YORK, AACORPORATION 0E lNEW YORK vENEER` OLIIPING MACHINE ApplicationlledJanuary 11, 1930. Serial No. 420,100.`

` This invention relates to cutting machines ofthe type adapted to clipsheetsv ofveneery into relatively short lengths, which machines will behereinafter-referred to generally yas lin general, it is an ob'ect ofythe invention to provideY a machine of the character de# scribed Whichis simple, sturdy and permanent in construction, which maybe readily,easily and economically assembled, yand whichwill efficiently accomplishthepurposes for which it is intended.

Anotherobject of the invention is to provide a veneerlclipping machinewhich will accuratelyy and efficiently clip sheets of veneer inanespecially expeditious manner.

Another object is to provide a veneer-clipping machine, wherein'therelative position of the partsmay beladjusted with especial case.

'f Other Objects of the invention will'in part be obvious and will inpart appearhereinafter, y Y "The invention accordingly comprises the`features of -construction, combinations of elements, and arrangement ofparts, which will be exemplilied in the construction hereinafter setforth and the scope of the application of which will be indicated .inthe claims.

For a fuller understanding .of the nature and objects of the inventionreference should be had to the following detailed description takeninconnection with the accompanying Y drawings` in which:

' Fig. 1 is a side viewjof a veneer-clipping machine embodying theinvention, showing the same with the plunger in the middle of its strokeand withV theclipper knife' and shear plate in cutting position; i n

Fig. 2 is a vertical section along the line 2-2 in Fig.1;

Fig. 3 is a sideview of oneend of the machine showing the plunger at theend of one stroke, and with the clipper knife and shear plate in openposition.

Fig. 4 is a fragmentary horizontal sectional view along the line 4-4 inFig.` 1; showing the plunger in a position corresponding to its positionin Fig. 3. 4 v Y Fig. 5 is an enlarged fragmentary verticalsect-ionalong the line 534-5 in Fig. 1; and

F ig.l 6 is an enlarged fragmentary vertical section along the line 6 6in Fig. 1.

In veneer lathe assemblies arranged for the 'Ericsson H. Merritt,Serial4 No. 841,017, filed February 18, 1929; the limiting factor inoperation is ordinarily the speed of operation of the clipper, and it isaccordingly desirable to'y expedite the operation of the clipper.Moreover, the faster the veneer is fedv across the.' path of the knifethevgreater will be the tendency toward buckling, during the time whenthe iiow of the veneer is halted by the severing operation, and'inorderto minimize this delay the provision ofa clipper wherein thesevering operation is expedited is particularly. desirable.` Theaccuracy in the operation of a clipping machine andthe accurateconformity of the size of lengths into which the sheet is clippedarealso important factors in the satisfactoryA operation of such a ma#chine. y y

Vith these and other ends in View, there is provided, in accordance withthe present invention,-a machine which is quick acting, wherein the timeconsumed by the severing operation is reduced to a minimum, which willcut a continuously-moving sheet without a substantial interruption inthe continu-V ous movement of the sheet which will operate in aparticularly accurate manner, and wherein the parts can be readilyadjusted. n

It is to be borne in mind that such machines are ordinarily employed incases where the veneer lis stripped by a lathe knife moving at aconstant speed into a log which rotates at a constant speed, so that thespeed of flow of the veneer from' the lathe knife decreases, it beingunderstoodthat ther clipper operation may be suitably synchronized withthe speed of flow of the veneer', as, for example, by means such asexemplified inv thecopending applicationsl above identified. v n

I have found that the delay in the flow of veneer caused by the severingoperation can be materially reduced by movingthe clipper knife and theshear plate toward each other simultaneously instead of moving theclipper knife toward a stationary shear plate, and there is exemplifieda machine embodying this feature, as well as other features of theinvention.

The exemplified machine comprises a Yrame indicated generally 1.0 onwhich are mounted suitable means indicated at l1 for guiding areciprocable clipper knife assembly an d a reciprocable shear plateassembly. The knife assembly comprises a reciprocable knife support 13to which a knife 14 is se cured by means of screws l5 each extendingthrough one or another of a plurality of holes 1G in the knife and intoa hole in the knife bar. The shear pl assembly comprises a reciprocableshear plate bar 17 carrying thereon certain bars 13 and 18 andsupporting at its upper end a shear plate 1S), the shea-r plate beingsecured to the bars 13 in the present instance, by means of screws 20extending through a transversely extending slot 21 in the shear plateano` into holes in the bars 13. The bars 18 carry adjusting screws 22which bear against the inner edge of the shear plate so as to permit theposition of its cutting with respect to the cutting edge of the knife tobe accurately adjusted from time to time, it being only necessary torelease the. screws 20 temporarily to effect this adjustment. It will beapparent that the clipper knife assembly and the shear plate assemblymay be so constructed as to be of substantially equal weight tofacilitate the operation of the same in` a manner such as hereinafterexemplified.

In order to operate the clipper knife and shear plate assemblies insynchronism there is provided a plunger 25 arranged to be operated in asuitable manner, as by means of fluid pressure acting alternately onopposite sides of a piston 526, the stem 27 of whicl is, in the presentinstance, pivota lly connected to a link 28, which, in turn, ispivotally connected to the plunger 25. The supply of fiuid pressure tothe opposite ends of the piston may be controlled by a suit-able valve29, the operation of which may be timed in any desired manner, as bymeans such as exemplified in the copending applications of myself andEricsson H. Merritt, above identified.

W'ith a view to transmitting the plunger movement to the clipper knifeand shear plate in such manner as to cause a substantially continuousmovement of these members toward and away from each other during themovement of the plunger in one direction or the other, there areprovided connections, which in the present instance are of the typeexemplified in said copending applications and comprise togglemechanisms. As exemplified, the plunger 25 carries pairsof togglo joints30 at its ends, one arm 31 of each toggle joint being pivotallyconnected with the frame-work at 32 and the other arm 33 being connectedwith the shear plate bar at 34, the toggles being so arranged thatduring the movement of the plunger in either direction, as from one ofthe positions shown in dotted lines in Fig. 1, through the positionshown in full lines in Fig. l to the other of the positions shown indotted lines in Fig. l, the toggles will be straightened out to move theshear plate bar upwardly and will again be bent to pull it downwardly.In order to move the clipper knife downwardly and upwardly as the shearplate moves upwardly and downwardly, there are provided levers 35 eachpivoted at a point at 36 intermediate its endsto the upper end of an arm37, the lower end of which is pivotally secured at 38 to the frame. Oneend of each lever 35 is pivotally secured to the shear plate bar at 34and the other end is pivotally secured at 39 to an arm .40 which issuitably connected to the clipper knife bar.

In order to obtain a properly balanced action, the various toggle links,levers and arms whereby movement is transmitted from the plunger 25tothe clipper knife and shear plate assemblies are arranged in duplicateon either side of the plunger and the assemblies.

In instances such aslthe present, wherein both the `shear plate andclipper knife move, it is of particular importance to adjust therelative position of the same with the maximum of accuracy and theimportance of such adjustment is enhanced in machines of the typedesigned to operate on a sheet of material having a substantiallycontinuous flow. With a-view to facilitating an easy adjustment of thesemembers the arms 40 each comprise, in the present instance, a link 41pivotally connect-ed at 39 to one of the levers 35 and formed with anupwardly extending internally threaded socket member 42, into whichmember the lower threaded end of a rod 43 extends. Fixedly mounted oneach rod43 isV an adjusting gear 44 which intermeshes with a similargear on an opposite rod 43, so as to assure a` uniform movement of eachpair of rods 43.` The upper end of each rod is likewise threaded andfitsl into an internally threaded downwardly extending socket member 45forming a part of a link 46 which is pivotally connectedv at 47 to theclipper knife bar 13.

It will be understood that suitable slots will be formed where necessaryin all'members which are interposed between connecting elements toprovide clearance for the pivot pins, gears and other means' connectingthe toggle links, levers or connecting arms on either side of theinterposed members. Such slots are shown in Figs. 5 and 6, for example.

In order to hold the veneer sheet during the severing operation toassure an accurate fio andy smooth'cutting of the sheet and to assure animmediate stripping of the sheet from the knife with a view to avoidinga substantial interruption .of the lowof the sheet by the knife, thereare pro-vided one or more stripper plates 48, a plurality of such platesbeing provided inthe present instance to facilitate the clipping ofnarrow sheetsof veneer. It is particularly desirablein a case such asthe present, wherein the shear plate reciprocates, that the stripperplatey hold the veneer, or other material to be clipped, firmly againstthe shear plate during the severing operation and exert its stripping`action immediately thereafter, and to this end, each stripper plate iscarried on a plurality of rods 49, on each of which is mounted a coilspring bearing downwardly against a nut 51 on the rod and upwardlyagainst a cross arm 52 mounted on uprights 53 by means of nuts 54. .Itis to be observed that the pressure eXertedby each of the springs 50canrbe readily adjusted both by the adjustment of the nut 51 and by theadjustment of the arm 52 by the movement of thenuts 54.

With a view to further expediting the clipping operation, and in orderto make possibleV a movement of the knife 'and shear plate wherein anysubstantial delay is avoided'not' only between the forward andretract-ive portions of its stroke, but also between strokes, there isprovided in connection with the plunger 25, in the present instance, anarrangement whereby the initial` movement in each direction isexpedited. To this end, the plunger is provided with a central collar 55against which one end of a coil spring 56 and the opposite end of a.coil spring 57 arev adapted to press. The right-hand end of the coilspring 56, Fig. 1, presses against a slidable collar 58 which is securedby means of a pivoted link 59 to a stud 60 secured to the framework 10.Similarly the left-hand end of the spring 57, Fig. l, presses against aslidable collar 61 which is secured by means of a pivoted link 62 to astud 63 secured to the frame-work. In this manner, the spring 57 iscompressed as the plunger reaches the left-hand end of the stroke (asindicated in Fig. 4), and the spring 59 is compressed asthel plungerreaches the right-hand endv of the stroke; and thus the initial movementof theplunger in either direction is assisted b v a compressed spring,so that a high-speed forward and retractive movement of both the clipperknife and the shear plate can, in the present instance, be impartedthereto bythe toggle mechanism. f l,

' It will be seen that there hals thusbeen provided a machine whichoperates with particular efficiency and accuracy at a particularly fastrate of speed` and that the shearing action therein is such that theregular flow of the veneer is interfered with'vto a minimum r extent, itbeing apparent'that in a case where above constructionand differentembodi-v ments of the inventiony could be made without 'departing fromthe scope thereof, it is intended that all matter contained in the abovedescription. or shownr in the accompanying drawings, shall beinterpreted as illustratetive and not in a limiting sense.

It is also to beunderstood that the following claims are intended tocover all of the generic and specific features of the invention hereindescribed, and all statements of the scope 'of the invention which, as amatter of language, might be `said to fall therebetween. u y

I'Iaving described my invention, what I claim as new and desiretose'cure by Letters Patent, is: f

1. In a veneer-clipping machine, the com,- bination of a clipper knife,a shear plate, a reciprocable member, a toggle joint on saidreciprocable member, one arm of the toggle beingfixedly mounted and theother arm of the toggle being connected with said shear plate, apivotally mounted rocker arm, one end of said rocker arm being connectedto said shear plate and the other end being connected to said clipperknife, and ymeans to reciprocate said reciprocable member.

2. In aveneer-clipping machine the com-- bination of a reciprocablecutting member, a'plunger movable in a direction substantially parallelwith the cutting'edge of the cutting member and in a plane correspondingsubstantially to the plane of movement of the cutting member, andLconnections between said plunger and said cutting member forimparting atwo-way movement to the cutting member in response `to a one-waymovement of the plunger, said connections being arranged in duplicate oneach side of the plane of movement of the cutting member.

3. Ina veneer-clipping machine, the combination of a cutting member,operating means therefor adapted to imparta two-way movement to saidcutting member in response to a one-way movement in said means, andmeans associated with said operatingmeans and adapted to assist saidoperating means at the beginning of its stroke. n 4. In aveneer-clipping machine, the combinationI of a cutting member, operatingmeans therefor adapted to impart a two-way movement'to said cuttingmember in response Yto a rone-way movement in said means, said ico LLL

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eiated with said operating means, and means for compressing said springas said cutting member moves toward its retracted position.

5. In a veneer-clipping machine, the combination of a cutting member, aplunger, means to impart a two-way movement to the cutting member inresponse to a one-way movement of the plunger, a pair of springsassociated with said plunger, one of said springs being arranged to becompressed ward the end of the plunger movement in one direction, andthe other of said springs being arranged to be compressed toward the endof the plunger movement in the other direction, whereby the initialmovement of. said plunger in each direction will be assisted.

6. In a veneer-clipping machine, the combination of a clipper knife, ashear plate, a plunger, means to move said clipper knife and said shearplate first toward and then away from each other in response to amovement of the plunger in one directionnand to move said clipper knifeand said shear plate first toward and then away from each other inresponse to a movement of the plunger in the other direction, a pair ofsprings associ ated with said plunger, one of said springs beingarranged to be compressed toward the end of the plunger movement in onedirection, and the other of said springs being arranged to be compressedtoward the end of the plunger movement in the other direction, wherebythe initial movement of said plunger in each direction will be assisted.

7. In a veneer-clipping machine, the combination of a movable clipperknife, a movable shear plate, means to impart symmetrical movement ofthe clipper knife and the shear plate toward and away from each other tocomplete a clipping operation in response to an unreversed motion insaid means, and means to adjust the planes of the cutting edges of saidknife and shear plate with respect to each other.

8. In a veneer-clipping machine, the combination of a clipper knife, ashear plate, a plunger means to impart two-way motion to the clipperknife in response to a one-way motion of said plunger, a stripper plate,resilient means tending to press the stripper plate toward the shearplate, and means to adjust the eective pressure of said resilient means.

9. In a veneer-clipping machine, the combination of a clipper knife, ashear plate, means to move said clipper' knife and said shear platesimultaneously toward each other, a stripper plate bearing against saidshear plate, resilient means tending to press the stripper plate towardthe shear plate, and means to adjust the effective pressure of saidresilient means.

l0. In a veneer-clipping machine, the combination of a clipper knife, aslear plate, means to move said clipper knife and said shear platesimultaneously toward each other, a plurality of stripper plates spacedlongitudinally along said machine, resilient means associated with bothends of each stripper plate, and means to adjust the effective pressureof said resilient means.

11. In a veneer-clipping machine, the coinbination of a clipper knife, ashear plate, a plunger, means connecting said plunger with said clipperknife and with said shear plate to impart a movement of said clipperknife and said shear plate, both toward and away from each other inresponse to a movement of the plunger in one direction and to impart amovement of said. clipper knife and said shear plate both toward andaway from each other in response to a movement of the plunger in theother direction, said connecting means including means to adjust therelative positions of said clipper knife and said shear plate.l means tomove said plunger in one direction aud in the other direction, and apair of springs associated with said plunger, one of said springs beingarranged to be compressed toward the end of the plunger movement in onedirection and the other of said springs being arranged to be compressedtoward the end of the plunger movement in the other direction to assistthe initial movement of said plunger in each direction.

1Q. In a veneer clipping machine, the combination of a frame, a clipperknife, a shear plate, a reciprocable member, a toggle joint on saidreciprocable member, one arm of the toggle being flXedly mounted and theother end of the toggle being connected with said shear plate, an armpivotally secured to said frame, a second arm pivotally secured to saidknife, a rocker arm, one end of said rocker arm being connected withsaid shear plate, an intermediate point of said rocker arm pivotallysecured to the free end of the firstmentioned arm, and the other end ofsaid rocker arm being connected to said second arm, and means toreciprocate said reciprocable member.

13. In a veneer clipping machine, the combination of a frame, a clipperknife, a shear plate, a reciprocable member, a toggle joint on saidreciprocable member, one arm of the toggle being fixedly mounted and theother end of the toggle being connected with said shear plate, an armpivotally secured to said frame, a second arm pivotally secured to saidknife, a rocker arm, one end of said rocker arm being connected withsaid shear plate, an intermediate point of said rocker arm pivotallysecured to the free end of the firstmentioned arm, and the other end ofsaid rocker arm being connected to said second arm, means to reciprocatesaid reciprocable member, and a pair of springs associated with saidmember, one of said springs being arranged to be compressed toward theend of the movement of said member in one direction, and the other ofsaid springs being arranged to be compressed toward the end of themovement of the said member in the other direction whereby the initialmovementA of said member in each direction will be assisted.

In testimony whereof I aix my signature.

RICHARD W'. STANLEY.

